Governor for steam-engines.



No. 723,185. PATENTED MAR.1'7,1903. v

. P. RIGHEMOND.

GOVERNOR FOR STEAM ENGINES. APPLICATION FILED MAR. 19, 1902.

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PATENTED 11,411.17, 1903. P. RIGHBMOND. v GOVERNOR FOR STEAM ENGINES.

APPLICATION FILED MAR. 19, 1902.

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PATENTED MAR. 17, 1903. P. RIGHEMOND.

GOVERNOR FOR STEAM ENGINES.

APPLIOATION FILED MAR. 19, 1902.

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x No. 723,185.

,4 PATENTED MAR. 17,1903.

P. RIGHEMOND. GOVERNOR FOR STEAM ENGINES.

APPLICATION PI IWZI'IyAJBSP, 1902.

N0 MODEL. 4 SHEETS-SHEET 4- PIERRE RIOHEMOND, or PAN'IIN, FRANCE,ASSIGNOR T socntrrj ANONYME DES ETABLISSEMENTS WEYHER ET, RIOHEMOND, orPANTIN, FRANCE.

GOVERNOR STEAM-ENGINES.

\ SPECIFICATION formingpart of Letters Patent No. .723,185, dated March17, 1903.

Application filed March l 9, 1902. Serial No. 99,013. (No model.)

To all whom it may concern.-

Beit known that I, PIERRE RICHEMOND, engineer, a citizen oftheFrench'Republic, re-

siding at Pantin,-Seine, France, (post-office address 50 RoutedAubervilliers, in said city,)

have invented certain new and useful Improvements Relating to Governorsfor Steam- Engines, of which the following is a specification.

This invention relates to valve gear for steam -engines in which thedistribution of steam is effected bya D -valve, a piston-valve, or thelike having lap and lead, and has for its object to provide anarrangement whereby the rate of cut-oh? canbe varied by causing thegovernor to act on an eccentric to alter its throw without having toovercome too great aresistance. g

The essential feature ofthisinvention consists in utilizing for thepurpose the rotary motion of the eccentric relatively to its straps, andin orderthat the invention may be clearly understood I will now proceedto describe it with reference to the accompanying drawings,in whichgFigures 1 and 2 are vertical sections of an arrangement of mechanismaccording to this invention, the section in Fig. 2 being taken through aline A Hot Fig. 1. Fig. 3 is alongitudinal section through line A B (notshown) of Fig. 5. of Fig. 3, partly in section. Fig. 5 is a horizontalsection on line (J D of Fig. 4, and Fig. 6 shows the improved mechanismconnecting the controlling device with the governor.

Like letters and numerals are employed to indicate similar partsin allthe figures.

In the figures, Ct represents an eccentric sheave through which passesthe shaft 1), the said eccentric being capable of occupying variouspositions relatively to the axis of the shaft. Forexampl'e, as shown inthe drawings, the center of. the eccentric is capable of moving to anypoint between the extreme positions o and i e is theeccentric-strap,which is connected to the slide-valveby the rod f.

The eccentric-sheave a has an elongated .openinga therein, through whichthe shaft 1) passes and which permits of the eccentric being shifted inposition to the extent indi- Fig. 4 is a side elevation cated by c d.The eccentric-sheave a is integral with a disk 7, inclosed in a drum 9,keyed on the shaft 1), and is in contact with the interior of the saiddrum, within which it can slide, it being guided in its movement by twofeathers l0 and 11 to insure it moving in the proper direction and atthe same time serving to impart to the said disk 7 and eccentric-sheavea rotary motion with the drum 6v 9, which is rotated by the shaft 1).Through a part 7*, which connects the eccentric-sheave ct to the disk 7,passes a spindle 12, which carries on one end a bevel-wheel 14, Figs. 1and 2, (or a worm-wheel 33, Figs. 3 and 5,) its other end beingscrew-threaded and screwing intoa nut 13, Figs. 1, 2, 3, and 4, fittedin the boss 7* of the drum 9, so that if thescrewthreaded spindle 12 isrotated the disk 7 and the eccentric-sheave a will be moved along thefeathers 10 and 11, the elongated opening a, embracing the shaft b,admitting of this movement.

-' As shown in Figs. 1 and 2, the eccentricstrap e is provided with aworm t, with which can be caused to gear two worm-wheels u and 'v,mounted loosely on the spindles or axlesw and y, carried on a spindle z,capable of be ing partially rotated in a boss 8, integral with the disk7.

As bevel-Wheel 1 is formed integral with the worm-wheel u and anotherbevel-wheel 2 is also formed integral with the worm-wheel v, the wheelsto and 1 are loose on the axle 00 and the wheels v and 2 are loose onthe axle y. The wheels 1 and 2 gear with a wheel 8, forming part of asleeve revolving freely .on the spindle 2 within the boss 8 and with abevel-Wheel 15, situated outside the boss 8, this latter bevel-wheel 15gearing with the go bevel-wheel 14 on the aforesaid screwed spindle 12.On the spindle z is a crank 3, on the crank-pin t of which is mounted arod connected to the governor by suitable means. The operation of thisarrangement is as follows: When the spindle z is turned in the sleeve bythe crank 3 to operate the governor, the crank-pin 4 of the crank 3 willbe caused to recede from or approach toward the axis of the shaft b, thepartial rotation rco of the spindle z causing one or the other of thewheels to and o to gear with the worm t,

and since there is a considerable relative motion between theeccentric-strap e, which does not revolve,and the rest of the mechanism,which revolves with the shaft, it will be understood that as soon as theworm i comes in contact with one or the other of the wormwheels u and oa rotation of the wheel 8 will take place and impart rotation to thescrew 12 through the medium of the wheels Hand 15 in one direction orthe other, according to which of the wheels U. or o be in gear with theworm t. The rotation of the screw 12 results in a movement of the samein the nut 13, and as the screw 12 forms part of the disk 7,with whichit revolves, longitudinal motion of the screw causes a longitudinalmovement of the disk 7 on the feathers l0 and 11 and the centerof thesheave comes nearer the point 0 or the point d,according to thedirection of rotation imparted to screw 12. The direction of the threadsof this screw is such that if the crank-pin 4 on receding from theshaft 1) causes the worm-wheel u, to gear with the worm t the operationof the system as it has just been described causes the center of disk 7to move toward the point 0, and thus to throw the worm wheel to out ofgear with the worm t. It, on the contrary, the crankpin 4 is movedtoward the shaft 1), the wormwheel '0 is caused to gear with the worm t.The operation of the system has for effect to shift the center of thedisk 7 toward the point at and to cause the wheel u to be thrown out ofgear.

In the modified arrangement shown in Figs. 3, 4, and 5 theeccentric-sheave a is integral with the disk 7, mounted within the drum9, inside which it is capable of sliding. This sliding motion isobtained, as hereinbefore described, by means of the screw-threadedspindle 12, and the direction of the sliding motion of the sheave isinsured by two feathers 16 and 17 engaging with grooves provided in thedisk 7., These feathers not only guide the disk 7 in its longitudinalmotion, but also cause it to participate in the rotation of the drum 9,to which the said feathers 16 and 17 are attached. The disk 7 carriesthe whole of the parts which determine its sliding motion within 9 andare arranged as follows: A worm-wheel 18, actuated by the worm t on theeccentric-sheave, is integral with a bevel-wheel 19, gearing with abevel-wheel 20, which is integral with a bevel-wheel 21. The bevel-wheel21 gears with two other bevel-wheels 22 23, which rotatein oppositedirections. The worm-wheel 18 and the bevel-wheel 19 rotate loosely onan axle 24, one end of which rests in a support 26 and the other end ina support 27, which also carries the axle 25, on which the wheels 20 and21 revolve. The bevelwheels 22 and 23 rotate on the axle 28, carried bythe supports and 31, attached to the disk 7. The axle 28 carries betweenthe wheel 23 and the support 31 a worm 32, gearlng with a worm-wheel 33,keyed on the upperend of the screwed spindle 12. The part 29 of the axle28 carries a sleeve 34, participating in the rotary motion of the axle28 and capable of sliding on this axle under the action of a forkedbell-crank 35, pivoted on the pin 36, fixed to the disk 7.

The sleeve 34 is provided on both ends with claws or clutch-teethcapable of engaging with corresponding teeth formed on the internalfaces of the bevel-wheels 22 and 23, so as to cause either of thesebevel-wheels to rotate with the axle 28, according to the position ofthe bell -crank 35. When the two wheels 22 and 23, as shown in Figs. 3,4, and 5, are out of gear with the sleeve 34, they rotate loosely on theaxle 28.

The whole of the parts 18 to 35 are carried by the disk 7 andparticipate in its motion when the eccentric a moves along the path 0 d.The operation of this arrangement is as follows: The motion of theeccentric within the strap 6 causes the rotation of the wormwheel 18around the worm t, forming part of the said strap 6. The wheel 18,gearing with the worm t, is thus caused to rotate on the axle 24 andthrough the wheels 19, 20, and

21 cause the rotation of the Wheels 22 and 23, which rotate loosely onthe axle 28 so long as the sleeve 34 is not in gear with the wheels 22and 23. When the crank-pin 40f the bellcrank 35 is moved away from theaxis of the shaft 1) by the rod 37, the bell-crank 35 turns on the pin36, and the sleeve 34 is caused to engagewith the bevel-wheel 23 andimpart rotatory motion to this wheel and through the sleeve 34 rotatesthe spindle 28, which in turn rotates the screwed spindle 12 through themedium of the worm 32 and worm-wheel 33. The direction of the threads ofthe worm 32 and screwed spindle 12 is such that therotation of thisscrew by the bevel-wheel 23 moves the center of the disk 7 and eccentrica and the whole of the parts carried thereby away from the axis of theshaft 1). This movement of the center causes the sleeve 34 to be thrownout of gear with the wheel 23. The movement of the center of disk 7 onthe path 0 cl is therefore proportional to themovement of the crank-pin4, caused by the rod 37. If the crank-pin 4 be moved in the oppositedirectionthat is to say, toward the axis of the shaft bthe sleeve 34 iscaused to gear with the wheel 22. This who-e122, which rotates in adirection opposite to that of wheel 23, causes the screwed spindle 12 torotate through the medium of axle 28, worm 32, and worm-wheel 33 in suchmanner that the center of the disk 7 is moved toward the axis of theshaft 0, causing the sleeve 34 to be disengaged from the bevel-wheel 22when the crank-pin 4 ceases to be acted upon by the rod 37.

It will be seen from the foregoing that the center of the disk 7 andeccentric a is constrained by the feathers 16 and 17 to move ICC IIO

i 4, controlled by rod 37, and that the effort exerted" by this rod isvery small, as it has only to throw the sleeve 34 in gear with either ofthe bevel-wheels 22 or 23. The eflort required for the movementof thedisk 7 is supplied by the worm t and transmitted thereto by the wheels18, 19, 20, 21, 23, 32, and 33. When the cran k-pin 4 has been moved soas to cause the sleeve to engage with either of the wheels 22 or 23, ithas a tendency to follow the movement of the disk 7, and to prevent thisit is necessary to exert on it an effort corresponding to the frictionof the clutch. Fig, 6 shows an arrangement to prevent this effort frombeing borne by a governor-rod controlled directly by a governor which itis wished to protect against reactions that might impair ts sensitiveness.

For this purpose the governor rod 37 is not directly connected to thecrank-pin 4, but is jointed at 38 to acollar 39, embracing the shaft inand carrying a curved slotted link 40, the slot of which is eccentric tothe axis of the shaft 1), point 41 being the center from which thecurved slot is struck. A block 42 is fitted to slide in the curved slotandis connected to one end of a rocking lever 43, pivoted in 44 on asupport 45 in the drum 9.

When the rod 37 causes the'collar 39 to turn on the shaft b,the slottedlink 40, turning around shaft b, brings the block 42 nearer to orfarther from the axis of the shaft b and rocks the lever 43 on itscenter. These movements of the lever 43 are transmitted by the rod 46 tothe crank-pin 4 and cause the sleeve 34 to be thrown in gear with one orother of the bevel-wheels 22 or 23, as hereinbefore explained. When thesleeve 34 tends to disengage the said wheels in consequence of themotion of the disk 7 and the immobility of the crank-pin 4, the

reaction due to the friction of the sleeve 34 is transmitted by the rod46 and lever 43 to the block 42 and through it to the slotted link 40;but the slot in this link is so arranged that the movements of the linkare transmitted to the block 42, and as this block is pressed by thelever 43 on the sides of the slot it caunotcause the slotted link toturn on the shaft 1) on account of the friction.

This arrangement constitutes a non-reversible transmission member, whichtransmits theefiorts exerted on the rod 37, Fig. 6, to the crank-pin 4;but the eiforts exerted on the crank-pin 4 are not transmitted to therod 37; V

Having now particularly described and ascertain-ed the nature of thisinvention and in what manner the same is to be performed, I

declare that what I claim is- 1. In a valve-gear for engines, thecombination with an eccentric-sheave and its; strap, a worm attached tothe strap, a drum, a disk connected with the sheave and operating withinthe drum, a screw connection between the sheave and the drum, and ashaft for supporting said sheave and drum, of a means for rotating thesaid screw in opposite directions, said means consisting of gear-wheelscarried by said disk, an oscillating shaft controlled by the enginegovernor, gear-wheels-mounted on said oscillating shaft and adaptedto be moved into gear with the said worm, and a pair of gear-wheelscarried by said oscillating shaft and adapted to be moved into gear withone of the wheels carried by the disk.

2. In a valve-gear for engines, the combination of ashaft, a drummounted thereon, an eccentric-sheave mounted on the shaft and adapted toslide within said drum, a screw connection between the drum and theeccentric-sheave, a strap for the said sheave, a worm connected to thestrap, a disk integral with the said sheave, an axle carried by saiddisk, a continuously-moving gearing interposed between theeccentric-strap and the axle, a worm-wheel gearing interposed betweenthe eccentric-sheave and the drum, and a clutch mounted on the said axleand adapted to be operated by the governor of the engine, substantiallyas shown and for the purpose speci fied.

3. In a valve-gear for engines, the combination of ashaft, a drummounted thereon, an eccentric-sheave mounted on the shaft and adapted toslide within said drum, a screw connection between the drum and theeccentrio-sheave, a strap for the said sheave, a worm connected to thestrap, a disk integral with the said sheave, an axle carried by the saiddisk, a continuously-moving gearing interposed between theeccentric-strap and the axle, a worm-wheel gearing interposed betweenthe eccentric-sheave and the drum, a clutch mounted on the said axle, acollar loosely mounted on the said shaft, a slotted link integral withthe collar, a block sliding in the slot of the link, a lever connectedto said block, anda rod attached to the lever and tially as shown andfor the purpose specified.

In testimony whereof I have hereunto set my hand in presence of twosubscribing wit nesses.

PIERRE RICHEMO'ND.

suitably connected with said clutch, substan- IIO

